Desuperheater



L. l. SCHAEDLE.

DESUPERHEATER. Amm/mon man Mu. 23, 19201 1,420,344. Patented June 2o,1922.

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. l 31? Pf STATES- LEO J. SCHAEDLE, OF PITTSBURGH, PENNSYLVANIA.

To all wzfomit may concern.' v

Be it known that 1 LEo SCHAEDLE, la citizen of the United States,residing at Pittsburgh, in the county of Allegheny-and State ofPennsylvania, have invented n'ew and useful Improvements inDesuperheaters, of which the following is 'a specification. Theprincipal object of this invention is to permit a steam boiler plantfurnishingsup'erheated steam to deliver superheated steam to one typeof'steam engine, such as `a high pressure turbine, 'and saturated steamto a type of steam engine or other dejvice requiring such kindof steamfor its operation. This'invention is particularly .useful where anindustrial plant contains old types of steam engines ,operable by. satuvrated steam and where it is desired to install modern typesof steamengines operable by superheated steam. Inthis combination a singleboiler plant can supply superheated steam, a part of which may besaturated for use in the old types of engines, whose replacement owingto their high cost cannot' be replaced by units .using superheated steamwithout heavy financial losses.

Referring to thejaccompanying drawing, lFig. l shows a central verticalsection of my invention, some parts being in elevation, and Fig. 2 showsa section of the valve 25 and adjacent 'parts I` show a desuperheaterhaving two vertical chambers lor drums 1 and 2 preferably in axialalinement and of circular cross-sections.v The drum 1 is tapereddownwardly vas `shown at 3, its lower contracted end opening into atubular con'- neictor 4 of restricted cross-area, whichyconn nector isattached at opposite ends to the drums J1 and 2 and constitutes a meansof communication between their interiors.l

Each drum constitutes together with its in-- terna] structure a steamseparator. 1

The upper end of therdrum. 1 has the contracted outlet 5 to be'connected to drive -a steam-turbine or other engine employingsuperheated steam. Supei'heated steam is supplied-to the `drum 1 by theinlet pipe 6 l attached, for example, to the middle of yone side of thedrum,'whichhas the inlet opening 7 in line with the pipey6. The opening7 has fitted therein a short tube 8 extending toward the center of thedrum and provided at its inner end -with thev 'downwardly-turned iSpecification of Letters Patent. PatentedyJulle Application led January23, 1920. Serial No. 353,512.

'DESUPERHEATER.

velbow 9 is 'the conical baille 10 having its apex or ax1al centerarranged in line with the vertical center line of the drawing 1y and themouth of the elbow 9. There is an annular passage 11 between the drumand the yeriphery of the baffle.

ithinfthe drum 2 and near the uppe end thereof is the collecting conicalbaille 12` havingl its apex directed downwardly'and lying in thevertical'center lineof the drum and the connector 4. There is an annularpassage 13 between-the drum ,.2 and the pe-l riphery of the baille. Fromithe apex of the baille 12 there extends downwardly a vsmall drain.pipe 14. Beneath the baille 12 is a second downwardly-tapering orconical baille 15 having its periphery connected to the drum 2 and itslower end' truncated and extended downwardly by the vertical center.

pipe 16 which is ypreferably considerably larger thancthe nozzle openingy23. Below the center pipe there is a conical baille 17 having its apexextendirfg upwards and in the center line ofthe center pipe 16. The

drum 2 has the outlet 18 for saturated steam connected thereto betweenthe bailles 15 land *17.v The condensate from the steam collects in thedrum -2 below the baille 17 and maybe drawn oil in anyI suitablemanner,-

for example, by steamtraps (not shown) ,connected tothe nipple vor shorttubes 19 connectedto the outlet pipe 20. -The water gage 21of usualconstruction shows the level of the water or condensate'therein.

.22- is .a downwardly directed spraying'- `head arranged directly andcentrally below the outlet or nozzle 23 at the-bottom of the drum 1. Thespra ing head 22 is connected by the pipe' 24 wit a-supply of waterpreferably under high pressure. "In this pipe is a vthermostatic Yvalve25 or otherwater controlled by heat.

30 of the valve-25 through the pipe 26 and returned by the pipe 27 .pThe element 30 -may-be an accordion-shaped vessel contain- Steam from,the outlet A18 is supplied to the'therr'nostatic elementi ing a liquidwhich ischanged to gas when i heated toa ,sufficient temperature,k Thegas pressure in the4 element 30 elongates the lat; Aterl and pusles upthe'valve'stem 31, therefrom its seat. The element '30 is in a chamber34 separated'vfrom thecha'mber'35 for 'the' elbow 9 having the c enterof its mouth orfwater. passing through the. valve lseat and lower endatthe axial center of the drum. Within the drum 1 and -directly below .the

y into the pipe 24, The element 30 maybe of any-expansive' type. The onedescribed .iS

by causing t edv'alve proper 32 tobe raised extensivelyused withradiators of automo` tion window covered bythe hand-plate 29.'

The` operation of the described invention is as follows: uupe'rheate'dsteam enters the I npfperseparator/at the inlet and traverses vt epipe 8andelbow 9. 'The steam issuing f om the elbow 9,r'impinges on the baiiie10 and ltakes two courses. One part o f it passes in its superheated, orrelatively dry, condition through the outletto the steam engine orengines or`other apparatus requiring' su' perheated steam'. Another partof the steam after passing over `the -baie 10 continues' downwardsthrough the annular passage 1l, along the tapered wall 3, and thenthrough the contracted nozzleiopening 23 and down 25 the connector 4.The steam increases its ve- `in the second drum, for admitting water tolocity along the Wall 3 and issues at high velocity'from the nozzle -23andjin case the valve 32 is open, itpicks up the spray from the head 22,the spray and the steam Vintermingling.v Fromthe connector 4 the steamand watery vapor are discharged or'dashed into the collectingbaiiie 12where the steam and vapor are more thoroughly mixed and `atomizei. orIhesteam and vapor then move 35 up oler the baiiie 12vand escape throughthe f' annularpassage 13 with theirvelocity again lincreased, wherebytheyp'ick up more moisj ture owing to the increased velocity, The

mingled steam and vapor pass Non f down! 40 ward, the baiiie 15 bringingthem to the central pipe 16, whichidirectshtheni in an expandingcondition against the baiiie 1.7. During'the travel of thesteam'downwardly the :fwater has become thoroughly atomized, due

to their expansion, contraction, and changes in velocity. llhe stean nowthoroughly saturated passes Afrom' the lower separator vthrough theoutletA v18 toany suitable'apparatus using saturated steam. vAt thebaiile 17 just before the'steam passes out of the separator, any excessofy water in the steam is diverted downwardly into thebottom of the.lower separator.

lf the steam passingthrough the pipe to the thermostatic element 23ofthe valve 25 has the temperaturecorresponding to the desired degreeof'steamsaturation (the thermostat being'set to open the valve if the-tema peratul'e of its' actuating element is above ,that required forvsaidfdegree of saturation)," the valve '32 remains closed;l but, iflthetem.

fperature of the steam passing through the outlet- 18 rises above thatcorrespondlng. to

l the desired degree-of saturation, the hotter 'steam traversing the'Ip1pe'26 causes the oper-` `drum, for admitting water to the last namedation of the valve 32 and the `,discharging 'of water sprav from thehead 22 into the connector 4. Here the steam picks up the spray whichcauses its temperature to fall. When the steam hasbecomesaturated tothesaid degree, the cooler steam from the pipe l26 causes the valve 32i/toclose. The opening and closing of the valve 25 occurs automatically asthe steam is below saturation or at saturation. e

Modifications of my invention may be made without sacrificingA theprinciples thereof.

claim: 1. The combination of a drum, means for admitting superheatedsteam into the same, outlet means leadingfa portion of thesuperheatedsteam from the drum, a lsecond'drum communicating with the first drum,means for increasing the velocity of a portion of the steam at someperiod lof its travel from the iirst drum to the second drum, means foradmitting water into the steam-during its increased velocity, and means,depending pony the degree of saturation of the steam the last namedmeans whenthe saturation 1s belowa predetermined degree and cutting' offthe water when the saturation is of saidde ree. f

The combination of a drum, means for admitting superheated steam intothe same,

"outlet meansleading a portion of the superwater intothe steam duringl'its' increasedV velocity, and means, dependingupon the dea grec ofsatlration ofthe steam in the second means when the saturation is below:apredetermined degree and cutting oi the water when the saturation isof said degree.

3;"The combination of a drum, means -fo v aglmitting'superheated steamlinto the same, outlet means leading a portion ofthe superheated steamfrom the drum, a second drum communicating with the iirst drum; acontracted nozzle for increasing the velocity of a portion of the steamat some period of its travelA froml theL firs drum. to the second\ drum,means for lad 'ittingwater into the.Y steam 'during gitsfincreasedjvelocity; and means, depending upon thedegree of satuf ,ration of thesteam in thesecond drum, for

admitting superheated'steam into the same, 'l..3v

'io l gree of saturation of the steam inthe second drum, for admittingwater to-the last named means when the saturation is below apredetermined degree land cutting 'oif the water when the saturation isof said. degree.

`5. The combination of a drum, ,means for admitting superheated steam.into the same,` outlet means leading a portion of the superheated steamfrom the-drum, means for pro# jecting the steam away from the saidoutlet means, a second drum communicating'with the iirst drum, a baillefor spreading the projected steamfa second drum communicating 'i withthe first drum, means for. increasing the velocity of a portion of thesteam at some period Qfits .travel from the first drum to the seconddrum, vmeans'for admitting water into the steam during its increasedvelocity, and means, depending upon the de;

gree of saturationyof the steam inthe sec ond drum, for ,admitting Watertothe last named means when the saturation -is below a predetermineddegree and cutting -ol' @he water when the'saturation is of saiddegree.` 6. The combination of a drum, means for admitting superheatedsteam into the same, outlet means leading a portion of the 'super-lheated steam from the drum, a second .drumcommunicating with thefirstdrum, means for increasing thefvelocityof aportion yof the steam atsome period', of its-travel from the first drum `to thesecond.dru1'n,meansf or` admitting water in the form ospray 'into thesteam duringits increased velocity,'an means,dependingfupon the degree'off-saturation of the steam inthe second drum, for

admitting water Ato the last namedz'means when thel saturation is below:a" prede.- termined degree and cutting of f the water when thesaturation is of said degree.

7 The combination of a'drum, ,meansV forV ladmitting superheated steaminto the" same, outlet means leading yaportion ofthe super-A heatedsteam'from thedrumfa second druml communicating lwith lthe first drum,means' for `increasing the velocity oifla @portion of the steam at some'period of its travel from the firstV drum to thejsecond drum, vmeanswater into the steam during for admittiig velocity, means causing theitsv increase V'water in the steam to becdmemore finely subdivided andmore: intimately mixedfwith the steamfand means, depending upon thedegree of saturation of the? Steam inthe second drum, for-admittingwater to the vlast named means when the saturation is below apredetermined degreeand cutting off the' water when the saturation is of\,said' degree.

8; The combination of a drum, means for admitting superheated 'steaminto` the same,l

outlet means leading a portion of the superheated steam from'thekdrum, asecond d rurn` communicating with the first drum,` means for increasingthe velocity of a portion of the steam at'. some period of its v travelfrom' the first drum to the second drum, means for Aadmitting waterinto-the steam during its' increased ve1ocit'y`,a 'baiile )in the path,of the watered steam, and means, depending upon the degree ofsaturation of the steam in` the second drum, for -admitting water to thelast namedjme'an when the saturationl is below a predetermin d degreeand cutting oil" the Water when the saturation is of said degreev 9. Thecombination-of a drum, means lfor.

admitting lsuperheated steam into Vthe same,

outlet means leading a portion of the super-l heated steam from thedrum, a Asecond drum communicating with the first drum, means forincreasing the velocity of a portion of the steam at vsome period of itstravel -from thefirst drum to the second drum, means for admitting waterinto,the steam during its `.increased vel city, a dished collectingbaflie arrangedin t epath of the watered steam,

andmeans, depending upon the degree of l saturation of the steam in thesecond drum, 4for admitting water to the last named means when thesaturation is'` below a predeter- -mined degree and cutting oil? thewater when Athe saturation is of said degree.

.10. 4 The combinationl of a drum, meansl for admittingv superheated'steam into `vthe\ same,

`outlet means leading a portion' of the superheated steam from the drum,a second ldrum communicating with the first'drum, means for increasingthe velocity of a portion of the steam .at some period ofits'ltravelfrom' the' first drum to the second drum, lmeans for admittingIwatenintothe steam during its increasedvelocity, a "dished' collectingbaille 'arranged' in the path of the watered vsteam spacedrom'the wallof the second drum se as .to create anannularpassage for the steam'passing from, the collecting baffle -and means, depending uponthedevree o saturation ofthe steam in: the secondsA drum,

.for admitting waterto the last named means when the4 saturation isbelowa predeter mned `tiegreeand :uttingol:l the `water when thesaturation is vof said degreel 11. The combination of a drum, means forladmittin superheated steaml intothe `same,

outlet means leadin a' portion of the super.- heated steam from t eldrum, a second Idrum communicating with the first drun, means forincreasing the velocity of a portion of. vthe 'steam at some period ofits traveldfromI the first drum 'to the second drum, means for.

admitting water into the steam during its increased velocity, a bailearranged to .spread .the watered steam, a second baie beyond the saidbaie to contract.' the 'saidsteam, and means, dependingupon the degreeof saturation of the steam in the second drum,A for admitting Water tothe last named means when the' saturation lis below a' predetermineddegree andrcutting ofi' the water when the saturation is of said degree.

12. The combinationof a drum, means for admitting suplerheated steaminto the same,

`outlet means leading a portion of the superheated steam from the drum,a second drum communicating with. the first drum, means. for lnereasingthe velocity of a portion of the steam' at some period'of its travelfrom thevirst drum to the second dru-m,` means for admitting water intolthe steam lduringI for admitting water to the last named means when thesaturation is below a predetermined degree and cutting off the Waterwhen the saturation `is of said degree.`

Signed at Pittsburgh, Pa., this 19 day of Januaryrl920.

' LEO J. soHA-EDLE.

